Binder post



Nav. 6, 1928.

H. T. PAYNE El' AI..

BINDER POST Filed Feb. 21, 1927 Patented Nov. 6,1928. y y y 1,690,455 y UNITED STATES PATENT OFFICE.

HAROLD T. PAYNE, or SACRAMENTO, AND ronnns'r n. YOUNG,`OF QUINOY,

CALIFORNIA. n i

BINDER POST.

Application led February 21, 1927. Serial No. 170,023.

The present invention relates to improveand is formed near the bottom thereof with ments in posts for' loose leaf binders, and the a transverse pin 13 around which passes a 55 particular object of the invention is to prospring 14, V-shaped in form, the two legsO vide a post of the character described that is the spring extending upwardly and being longitudinally compressible so as to be bent outwardly at their extreme ends, as adapted for compress'nof a number of sheets shown at 16, to pass through apertures 17 in assembled in a binder, .Jut which automatithe walls of the plunger, and to engage with 60 cally locks against extension so that there is corrugations 18 in the inner face of the cylinno means, short of breaking the post, for disder. The position of the spring relative to assembling the binderl the corrugations and the arrangement of the A further Object of the invention is to latter are such that the projected ends'of the provide means allowing the posts to be suitteeth prevent the withdrawal of the plunger 65 ably extended for use in connection With a from the cylinder, while not interfering with binder exceeding in heaviness the normal the telescoping engagement to any depth derange of the post, without defeating the sired, within. the range of .the apparatus. object previously set forth. The bottom end of the plunger may be tem- Further objects and advantages of our porarily or permanently closed by a plug 19.l 7 0 invention will `appear as the specification '.,lhe reduced threaded end 9 of the cylinder proceeds. 8 may thread into the lowermost wing of The preferred form of our invention is the cover 2 directly, Or may thread into an illustrated in the accompanying drawing, in extension piece 21, which on its part presents which a reduced threaded extension 22 adapted to 75 Figure 1 shows -a perspective view of a be threaded into the bottom Wing. binder having our post incorporated therein; The manner of using our invention should 25 Figure 2 is a vertical section through an be readily understood from the foregoing edge portion of the binder illustrating the description. When the extension piece 21 use of our post; is used its reduced end 22 is threaded into 80 Figure 3 a detail view of our post taken by the lower-most wing 3 in the manner shown itself, considerably enlarged and Figure 2. The cylinder 8 is then threaded 3o Figure 4 a detail sectional view taken into the extension piece 21 in the manner along line 4 4 of Figure 3. shown in Figure 2. Thereupon, the plunger While We have shown only the preferred 11 is introduced through the top wing 85 form of the invention, it should be underand the perforations in the superimstood that various changes or modifications posed sheets to telescope into thecylinder.

may be made within the scope of the claim The plunger is firmly depressed until its hereto attached without departing from the head 12 comes in contact with the top face spirit of the invention. of the upper wing 3 and until the sheets of 90 In its preferred form the loose leaf binder the binder are firmly compressed between comprises the two covers 1 and 2 having the head andthe bottom end of the posts.

wings 3 hinged thereto as at 4, and a plural- The plunger is locked. relative to the cylinity of sheets of paper 6, arranged between dei` against reversal or withdrawal, so that two covers and held between the wings 3 by .it is impossible to take apart the loose leaf .95 means of posts 7 passing through registering binder after the posts have been applied. It perforations between the sheets and the Will be noted that the head 12 of the post is wings ofthe covers. not provided with any slot allowing` of the The peculiar construction of the posts is appllcation Of a screw driver, and that the the principal feature of lthe present invenhead is formed very flat so as to make it dif- 10o tion. As lllustrated in Figure 3, our posts icult to impart turning motion to the same comprise a cylindrical portion 8 terminating by any ordinary tool.

at the bottom in a reduced threaded end 9 We claim:

and adapted to telescopingly receive a plun- A binder post of the character described ger 11 formed with a head 12 at the top end comprising a cylinder formed with ratchet 105 thereof. The plunger is hollow on the inside teeth in the inner face thereof and a hollow plunger sliduble in lvlieeylinder having a. V-shnped spring therein with a. pin eXtending transversely tlnouglralle plunger :md the apexof the spring and with the ends of e the spring bent outwardly and projecting outwardly through the w21-ll of the plunger or engagement with 'tlie ratchet teeth 'se as to allow relative motion of the cylinder and the plunger in in theendo'f .the

one direction only and :L plug" lunger extending to within Close proximityl of the pin for eonning the A:iper: of the sp ring therebetween.

HAROLD T. PAYNE. FGR'REST lli# YOUNG. 

